Printing press



June 21 1938- c. w. HARROLD E1' Al. 2,121,195

PRINTINGPRESS June 2l, 1938. c. w. HARROLD Er AL 2,121,195 PRINTING PRESS I' Filevd Dec. 10, 1934 Y 4 Sheets-Sheet 2 I nvenar';

June 21, 1938. c. w. HARRoLD Er Ax.

FRINTING' PRESS Filed Dec. 10, 1934 4 Sheets-Sheet 5 IWVen-Or W Harrah?.

Hari' Charls C 7 Julie 21, 1938. c. w. HARROLD ET Al.

PRINTING PRESS Filed Dec. 10. 192.54

' 4 Sheets-Sheet 4 99 95 Invenar,

Charles WHar-rod. 98 Egg. Clye @.Horon.

. By M VLM n oaweyf.

Patented June 21, 1938 UNITED STATES PATENT OFFICE rnm'rnvc PaEss Application December 10, 1934, Serial No. 756,794

23 Claims.

This invention relates to improvements in printing presses, and has to do with cylinder mounting with throw-off means for a printing 4couple and for an, inkingmechanism, and with the mounting of the inker..

One of the objects of the invention is the. provision of novel means for mounting cylinders in printing presses.

`Another of the objects of the invention is the .provision of a simplied throw-off mechanism,

by means of which a cylinder is moved transversely to its length, either manually or auto# `matically. s o as to separate it from one or more Vother cylinders of a printing couple. Another object is the provision of apparatus of this character. in which the cylinder rotates upon the shaft and in which the transverse move-- ment ofthe shaft 4is brought about by a turning movement applied to one end of the shaft and transmitted through the shaft itself to the other end thereof.

Another object is the provision of apparatus of the character v.stated in which is embodied means for regulating the limits of the cylinder throw-off move'ment by manipulation of a single adjustment.

Another object is thev provision of simple and improved inker throw-off mechanism which is adapted for either manual or automatic operathrow-olf means for exposing' the form rollers of the inker for repair or replacement without disturbing any other elements of the inker.

Other objects and features of novelty will appear as we proceed with the description of that embodiment of the invention which, for the purposes of the present application, we have'illustrated in the accompanying drawings, in which Fig; 1 is a side elevational Aview of .an offset printing press embodying the invention;

Fig. 2 `is an `end elevation of the same with certain parts removed and others broken away in order to more clearly illustratethe invention;

Fig. 3 is a view similar to Fig. 1 after the trip mechanism has'been actuated, showing the blan- .ket cylinder thrown off and the form rollers of the inker thrown off; Fig. 4 is a further fra'gmental side elevation, showing th'e principal part of the inker raised to 50 expose the formrollers;

Fig. 5 is a fragmental plan view, partly in horizontal section, of the impression cylinder and the manual throw-off mechanism therefor;

Fig.`6,is a side elevation of the same with the mechanism in the throw-off position;`

tion, together with means associated with the (Cl. lol-247) Fig. 7 is a vertical central sectional view of the blanket cylinder and its'mounting;

Fig. 8 is a plan view, partly in section, illustratingthe pivotally mounted inker frames;

Fig. 9 is a detail end elevation showing the eccentric sleeve mounting for one of the'cylinder shafts and the adjustable rkey connection between the shaft and sleeve;

Fig. 10 is a detail sectional view taken substantially on the line I0-I0 of Fig. `1;

Fig. 11 is a fragmental elevational view showing the free end of the lower inker frame in its raised position; and

Fig. 12 is a fragmental, longitudinal sectional view of a modified form of cylinder mounting.

It isl common in printing presses to provide means for shifting one cylinder of a pair or couple transversely tospace the contacting surfaces slightly in order to prevent offsetting whenever there is any interruption of the feed' of paper sheets. Usually the cylinderV is keyed to 'its shaft,V and the latter -is journaled in eccentric bearings or y,sliding box bearings in the frame members. Each of the two bearings is moved by a separate operating means, and the two such f means are connected so asv to operate simultaneously, thus moving the cylinder axis parallel,to itself. If a change in the extreme positions of the cylinder is desired, as is necessary to vary the printing pressure or to Iallow for different thicknesses of paper, it is usual to alter the mechanism at both ends of the shaft, and considerable care must be taken to preserve the parallelism-of the altered cylinder with the others of the couple.

In the embodiment of the invention herein illustrated, the movable cylinder comprises a shaft upon which the'cylinder itself rotates, eccentric sleeves 'in' which the shaft is mounted and to which it is preferably keyed, and an operating crank attached to one of the sleeves. Variation of the limits of the cylinder throw is accomplished by a single length of adjustment in one of the operating links or levers. f-

cylinder throw-of.

Referring now to the drawings, the frame of the press comprises side members I0 and tie' rods Il. In the printing couple illustrated, there are three parallel shafts I2, I3 and I4, upon which are rotatably mounted a plate cylinder I5, ,a blanket cylinder I6, and animpression cylinder I'I.

The frame members I0 are formed with three -sets of aligned bosses I8, |91and` 20. In the bosses I8 are mounted sleeves with'gconcentrlc holes for'the reieption of the shaft I2.; Roller forthe reception of shaft I3, see particularly- Fig. v'1.' The shaft is rigidly connected with sleeve 23 by a key 24,`and the Vsleeve 2 3 is provided with an integral crank 25 by means of which' it may be oscillated. Sleeve 23 is provided with a flange 23 which engages the outerl surface of the frame. This flange is formed with a pair of arcuate slots 21 that receive studs-23 mounted in the frame. Washers 29 under the heads of the studs and preferably supported by spacing tubes engage the ilangevon the sides of the slots 21 and hold the sleeve 23 against movement outwardly away from the frame. In the end of shaft I3 there is a diametricai slot which is covered by a cap plate 3II, and in this slot there is a key 3| one end of which projects outwardly over the face of flange 26. The flangeE carries a pair of threaded ears 32 within which are mounted adjusting screws 33. By this means the relative angular positions of the shaft I3. and the sleeve 23' may be adjusted within certain limits, which adjustment as a rule will be necessary only when the machine is being assembled. The capplate 33 is held in` position upon the shaft. I3 by a pair of machine screws |35 which' extend through smooth openings in the cap into threaded openings in the end of the shaft. At the opposite end of the shaft there is a similar cap plate |33 which is alsoheld in place by machine screws |35.

Upon the shaft I3 we mount the inner races of roller bearings 22, these races being spaced from the sleeves 23 and 23' by short sleeves 34 and 35, while the two races are spaced apart by a sleeve or tubular member 33. When the parts are in position, one or both pairs of screws |35 maybe drawn up sufficiently to put the desired clamping pressure on the innerraces 22 of the roller bearings. At one end of the. cylinder 4overhansing the sleeve 34 there is a ring gear 31 which bolted or otherwise secured to the cylinder.

On the end ofthe crank 25 there is mounteda noddle pin 33 which is perforated to receive the threaded end of a short connecting rod 39, the lower end of which is formed vwith an eye which surrounds a pin 43 mounted in a bell crank lever 4| whichls pivoted to the frame at 42. This connecting rod 33 is provided with nuts on opposite sides oi' noddle pin, whereby adjustments can be made. -The lever 4I is provided with two adjustable studs -43 and 44 which are adapted to ensase with stop blocks u and 4s respectively on the frameiof the machine, thereby hunting the movement o`f the lever in either direction.'

The righthand end of lever 4I, as viewed in Figs. l1. 3 and 10, is formed with a slot 41 which taires apin 43 that isfmoimted in a lever 49 which pivots upon a pin 33 set into the frame I3. The lever 43 is also provided with two forwardiy projecting pins 3| and 32. These latter pins are, adapted to be engaged on their lower sidesbysbouldersontheowisidesofa plunger 53 which carries a roller follower on its lower end. This follower runs Aupon a cam 54 which is pinned to a shaft 55, the latter shaft carryingthe delivery cylinder 56.

Pivotally connected with the plunger 53 is a trip rod 51, which'may be automatically operated in connection with the sheet feeding mechanism of ,the press, or manually operated. It isshown in Fig. 1 ln the normal running position. In order to guide the lower end of plunger 53, and in order to provide pressure to hold the plunger follower against the surface of cam 54, we mount the lower end ofthe plunger upon a pivot 53 carried by the bifurcated ends of a bell crank lever 59 which is pivotally mounted upon the frame at 33. Within the bifurcated extremity of the other end of lever 59 we pivot a rod 6I'which is slidably mounted in a-.perforated ear 32 projecting from `the frame I Il. A coil spring 33 surrounds the rod 6I between the then when there is an interruption to the feeding of sheets, therod 51 moves toward the left from the position illustrated in Fig. 1, throwing the plunger 53 against the side of pin 5|. As the high spot of cam 54 raises the plunger 53, the shoulder on the left of the plunger engages beneath pin 5| and pushes it upward, thereby swinging the lever 49 from the position of Fig. 1 to that o f Fig. 3. Lever 4| is thereby swungto the position of Fig. 3, pulling downwardly upon the outer end of crank 25 and imparting a slight clockwise rotation to eccentric sleeve 23 which moves the shaft I3 suiilciently to throw cylinder I3 out of contact with cylinders I5 and I1. Cylinders I5 and I1 carry'gears 35 and 63 respectively which mesh with gear 31. The throw-off of cylinder I3 is of course insufficient to disengage these gears, and hence the relative angular positions of the cylinders are maintained.

The mounting of the impression cylinder I1 is the same as that of blanket cylinder I6. That is to say, it comprises a shaft I4 carried by eccentric sleeves 31 and 51' which are oscillatable in bosses 23, the shaft being keyed to, both of these sleeves, and the cylinder being rotatable upon anti-friction bearings 22 carried by the shaft.

Eccentric sleeve 31 carries a crank 53, upon the outer end of which is mounted a. noddle pin 39. A connecting rod 13 extends through the hole in the noddle pin and its effective length may be varied by means of nuts 1I threaded upon the rod and engaging-the noddle pin on opposite sides thereof. On its4 other end rod 13 is formed with an eye which receives a pin 12 set into one end of a hand lever 13 which is pivoted at 14 upon the machine frame. The hand l'liever 13. carries a projection in which is mounted a threaded stud 15 that is adapted to engage a stop 13 on the frame. Another stud ,ear 32 and adjusting nuts 64 threadably mounted 11 threadedinto a projection 13 on the frame is ybetween them. When it is desired to throw on 42,131,195 the `impression cylinder, theoperator grasps the handle on lever 'I3 and raisesit,l thereby pulling connecting rod"|9 toward the left until the crank 69 strikes the stud '|1,.which is the position of Fig. 6. By this movement the shaft Il is rotated v and moved eccentricallyaway from cylinder I9 and its shaft Il, separating the cylinders. The noddle pin Gland the pivots 12 and llareso Y. arranged'that, in the operative'position, pivot 12 lies justv above the line' of oentersbetween pivot il and noddle pin 99.` Printing pressure tending toseparate the cylinders tends to throw the pivot pin`|2 up still further. which isv resisted by stop 19. Hence any accidental throw-oif`of cylinder I'I is avoided; s l f Itwill be obvious that the automatic or manual `throw--oii can befapplied toany one of the three cylinders I5, I9 vand I'Lor to any two of them, or

to all three, if desired, although 'the' arrangement herein ,disclosed is preferred.

l So far as we aware, Itis' new the artI to employ a non-rotating shaft and to rotatably mount a cylinder upon such shaft. This arrangefing split bearingsfor'fthe shaft; th'eeylinder and j shaft are less readily deformed bythe passage of l foreign yobjects ybetween 'the cylinders. because a shaft rotatably mounted at onlygtwo points in the cylinder Ais moreresilientfthan a shaft pressed into or integral withfthe cylinder; 'the shaft may rbe somewhat deformedwithout linterfering with lthe vprintingy operation', since the cylinder will continue to run true unless itfalso is deformed;

thistype of` mounting-Permits the use of ball or 4roller bearings in conjunction with' eccentric or otherwise Amovable bearings for the` shaft without necessitating openings in the frame so large `-asto `interfere Vwith otherparts ofthe machine.

Fig.` 12- shows amodiilcation of thek construction l illustrated in Fig. 1s The arrangement is y similar to that of `1l'ig.-'1. ybutthe eccentric sleeve tensions I3| abut against the inner races of the f Y, Othe same as in thel previouslydescribedform of the invention. 'This modiiication'has certain advzbv increasing the diameter 4ofthecylinder sup` .GJ'V

inder. Furthermore it Permits removal of the v 'lcorresponding to sleevel 29v in Fig. 'l is proivided with a cylindrical extension |3| concentric with lthe shaft vHlbut. spaced therefrom. The eccentricsleeve at the opposite end lof the shaft is similarly'formed. l Surrounding the shaft I3 and extending nearlyacross the space between the frame members of the machine there is a sleeve |32 which at its ends has reduced portions I 33 upon which are mounted the inner races of the roller bearings22. These extensions |33 may also project intothe spaces between the cylindrical) extensions |9| and the shaft I3. The exbearings 22 and therefore hold them in position.

VThe shaft I3 is keyed` to the eccentricsleeve |39,

`and the operationof the throw-offis precisely vantages however. Itprovides greater rigidity porting member between the bearings of the cylcylinder withoutdisturbing its bearings, bythe y withdrawal o i' the'eccentricf'sleeve |39 and the corresponding sleeve atjthe opposite end of the 70V` o i [when the cylinder is free to betaken out of the mounting, and thefwithdrawal of. theshaft- I3,

machine without AdisturbingA the bearings which Inker 'I'he inker comprises a lower frame 99, which comprises two independent side members. This frame is pivotally mounted at one end upon a short shaft 9| which is xed in an` upwardly projecting part of the frame I9, and at the other upon a sleeve '92 mounted in the frame surrounding a short shaft 93, to which reference will be made again hereinafter. 'I'he two shafts 9| and 99 are, of course, in alignment. This frame 99 has brackets 94, 95 and 99 in which are rotatably mounted formrollers 91, 99 and 99 respectively, which run upon plate cylinder I in.

the normal printing position, as Fig. 1. Y

Also pivoted yupon shaft 9| and sleeve 92 is a second or upper frame 99, having side members and cross struts. While the pivotal mounting of frames 99 and 99 about a common axis is the preferred construction, it is permissible to mount them upon separate axes, and one of them may indicated in -be pivotally carried by theothenthelatter being pivoted in the main frame of the machine. In

frame 99 there may be mounted the remaining elements of the inker, including an ink fountain 9|, an ink drum 92, storage rollers 93 and99', and idler gears 94 and 95. A gear 96 on the inner end of shaft 83 meshes with idler 94 which drives a gear 91 on the shaft of roller 93, while idler 95 takes its driving force from gear 91 and transmits rotation to a gear 99 on the shaft of drum 92 and to a gear 99 on the shaft ofA roller 93'. In the operative position of the inker, the l two storage rollers 93 and 93' transfer ink to the members of frame 99 rest upon Athe forward ends` of frame 89 and hence are influenced by the springs I9| and their plungers |99.

` We provide means, however, to pull down the nforward ends of frame 99 against the action of springs |,9I and to hold both frames linv their lowered position, indicated in Fig. l, this means serving further to raise upper frame 99 to its fully elevated position shown in Fig. 4. The means in question comprises a pair of connecting ,rods |92 adjustably pivoted to the forward ends of the side members of frame 99. The lower extremities of these connecting rods are curved and are pivotally connected atl |93 with cranks |93' carried outside the main frame members by a rock shaft I 94. On one end of this shaft there is pinned a hand crank |95 by means of which the shaft'ma'y be turned from one extreme position, illustrated in Fig. 1, through an intermediate position, illustrated in' Fig. 3, where the springs I9| are free to act, and to its other extreme position, illustrated in Fig. 4, where the frame 99 is separated entirely from frame 99 and raised high enough to expose form rollers 81, 89 and 99 for removal and replacement. It will be noted that in Fig. i the pivot point |99 is over center in one direction, while in Fig. 4 it is over center in the other direction. vHence when either one of these positions has been assumed, the parts tend to remain in that position.

Adjustable screws |06 mounted in the connecting rods |02 engage the shaft |04 and limit the downward movement of rods |02 and the clockwise movement of crank |05. An adjustable screw |01 carried by the main frame |0 engages a projection |08 on the crank` |05 and limits the upward travel of frame 90, as indicated in Fig. 4.

It is desirable that the form rollers 81, 88 and 89 be lifted out of engagement with-,cylinder I5 whenever the feed of paper sheets is interrupted, and to this end we provide means for shifting crank |05 from the position of Fig. 1 to that of Fig. 3 whenever the throw-off for blanket cylinder I6 is operated. This means consists of a rod |09 pivoted upon the extremity of pivot pin 40 and resiliently supported from eccentric sleeve 23 by a coil spring I0. At its free end this rod is made slightly concave so as to fit upon projection |08 of crank |05. When the tripping mechanism of the press operates to shift rod 51 toward the left from the position of Fig. 1, and the plunger 53 is raised by cam 54, moving levers 49 and 4| to the positions of Fig. 3, rod |09 is carried toward the left and swings lever |05 over dead center, whereupon springs Y through plungers to lift the forward extremities of frames 80 and 90, thereby raising the form rollers 01, 80 and 89 sufliciently to clear plate 4 cylinder l5.

Driving connections latter shaft there` is keyed a gear H6 whichv meshes with gear 31 en blanket cylinder I6. The three cylinders of theL printing couple are intergeared, as previously/:explained When the blanket cylinder is thrown off, the movement is not uillcient to throw gear 31 out of mesh with gear On shaft outside of the frame I0 there is a sprocket wheel lli over which runs a chain IIB that extends upwardly and over a sprocket Wheel ||9 on shaft 83. It is by this means that the gear 96 is rotated and transmits driving force to the various moving parts of the inker, the connection of the latter with the gear 96 being unaffected by the swinging movement of frames 00 and 90, since the gear 96 is concentric with the pivots of these frames.

The dampening mechanism, which is indicated diagrammatically in the drawings, comprises a frame |20, a fountain roller |2|, a swinging ductor roller |22, a pair of rollers |23 and |24 in contact with the plate on the plate cylinder l5, and anintermediate roller |25. Roller- |25 carries a gear which meshes with a gear mounted in frame I0 and indicated at |26, which in turn meshes with a gear |21 on shaft 83. (See Figs. 2 and 8.)

`Variations from the described structure may be employed. Accordingly, we desire it to be understood that the scope of theinvention is to be regarded as defined exclusively bythe appended claims rather than by the foregoing description or the accompanying illustration.

Having thus described our invention, we claim:

1. In a machinel of the class described, a frame, a shaft journaled therein, a cylinder rotatably mounted on said shaft eccentrically with respect to the journals of the shaft, and means for displacing said cylinder transversely to its axis comprising means at one end of said shaft for imparting limited rotation thereto, said last men- |0| exert pressure actingl tioned means being adjustable for changing the K limits of rotation of said shaft.

2. In a machine of the class described, a i'ra'me, a shaft mounted therein, a sleeve surrounding said shaft between frame members, a cylinder rotatably mounted on said sleeve, and means for moving said shaft parallel to itself in said frame, said shaft being removable longitudinally from the frame and sleeve, whereby the sleeve and cylinder may be removed from the machine.

3. In a machine of the class described, a frame, a shaft mounted therein, a sleeve surrounding said shaft between frame members, a cylinder surrounding said sleeve. anti-friction bearings between said sleeve and cylinder, and means operable from one end of the shaft for moving the latter parallel to itself in said frame, said shaft being removable longitudinally from the frame and sleeve, whereby the sleeve and cylinder may be removed from the machine.

4. In a machine of the class described, spaced frameymembers, a shaft 'supported at its ends thereby, a cylinder carried by said shaft between the frame members, a member with which said cylinder cooperates, said cylinder being rotatably mounted upon its shaft, means for rotating said cylinder, throw-off means comprising mechanism for moving said shaft toward and away from said cooperating member, said mechanism including the movable shaft "itself, and means at one end only of the movable shaft for changing the limits of movement of that shaft.

5. In a machine of the class described, a frame, a shaft, a cylinder rotatably mounted on said shaft, means'for rotating said cylinder, throw-off means comprising circular mountings for the ends of said shaft, said mountings being rotatable in the frame and being fixed to the shaft eccentrically, and said throw-ofi' means also comprising means for turning one of said mountings.

6. In a machine of the class described, a frame, a shaft, a cylinder rotatably mounted on said shaft, means for rotating said cylinder, throw-off means comprising circular mountings for the ends of said shaft, said mountings being rotatable in the framel and carrying the shaft eccentrically, said shaft being locked against rotation in one of said mountings, and said throw-off means also comprising means for turning said last-named mounting. f

'1 In a machine of the class described, a frame, a shaft, a cylinder rotatably mounted on said shaft, means for rotating said cylinder, throw-off means comprising circular mountings for the ends of said shaft, said mountings being rotatable in the frame and carrying the shaft eccentrically, said shaft being lxedly keyed to one of said mountings and adjustably keyed to the other of said mountings, and said throw-off means also comprising means for turning one of said mountings.

8. In a machine of the class described, a frame, a shaft, a cylinder mounted upon and rotatable with respect to said shaft, means for rotating said cylinder, aligned eccentric sleeves rotatably mounted in said Aframe and carrying said shaft, one of said sleeves having a crank by means of which it may be oscillated, and means for swinging said crank, said last named means being adjustable to vary the limits of movement of the crank.

9. In a machine of the class described, a frame, a pair of aligned eccentric sleeves rotatably mounted insaid-frame, a shaft mounted in said sleeves. a cylinder rotatably mounted upon the shaft between the sleeves, and means for moving said shaft transversely to itself comprising means for` turning one of said sleeves, said shaft acting to transmit the turning motion to the other sleeve.

10.l In a machine of the class described, a. frame, a shaft carried by the frame, a cylinder within the frame supported by and mounted to rotate around Isaid shaft, anti-friction bearings for the cylinder at the opposite ends thereof, annular abutments against which the inner ends of the inner races of said bearings engage, eccentric sleeves carried by the frame with openings therein for the-reception of the ends of the shaft, extensions for said sleeves projecting inwardly intoengagement with the outer ends of the inner races of said bearings, and means for turning one of said sleeves.

11. In a machine of the class described, a frame, a shaft carried by the frame,.a cylinder within the frame supported by and mounted to rotate around said shaft, anti-friction bearings for-the cylinder at the opposite ends thereof, annular abutments against which the inner ends of the inner vraces of said bearings engage, eccentric sleeves carried bythe frame with openings -within the frame supported by and mounted to .rotate around said shaft, anti-friction bearings for the cylinder at the opposite ends thereof, annular abutments against which the inner ends of the inner races of said bearings engage, sleeves movably mounted in the frame within `which the ends of the shaft are supported, extensions for said sleeves projecting inwardly into engagement with the outer ends of the inner races of said bearings, and clamping means carried by said shaft outside of the frame members for forcing said sleeve inwardly to rmly grip the inner races of said' anti-friction' bearings.

" 13. In a machine of the class described, a hollow roll, an axle extending therethrough, bearings for said roll mounted on said axle, frame members, mounting blocks in said frame members, said axle extending into said mounting blocks, caps over theends of said mounting blocks, and

screws extending through said caps into the ends of said axle.

frame, mounting blocks in said frame, an axle l supported in said mounting blocks, annular abutments carried by said axle, a roll mounted for rotation on said axle, anti-friction bearings interposed between said roll and said axle, and means including said mounting blocks for clamping the inner races of said bearings against said abutments.

15. In a printing press, spaced frame members, a hollow cylinder disposed between said frame members, an axle extending throughsaid cylinder, roller bearings interposed betweensaid cylinder and the axle, annular abutments carried by the axle against which the inner races of said bearings abut, mounting blocks in said frame members for receiving and supporting the ends of said axle, caps on the ends of said mounting blocks, and screws extending through said caps frame, elongatenormally stationary means car-- ried by the frame, a printing cylinder `within the frame supported by and mounted to rotate around said means, anda pair of anti-friction bearings interposed between the cylinder and said means, said stationary means comprising a hollow member having annular abutments against which the inner races of said bearings abut, and

comprising also means for holding said vraces against said abutments including a removable shaft extending-through said bearings and 'said hollow member.

1'7. In a machine of the class described, a

frame, elongate normally stationary means carried by the frame, a printing cylinder within the frame supported by and mounted to rotate around said means, and a pair of anti-friction tion against which-the inner race of one of said bearings abuts, means for holding said inner race against saidY sleeve portion, and means cooperating with said "shaft and said holding means to prevent lateral movement of said sleeve relative to said shaft.

18. In a machine of the class described, frame members, elongate normally stationary means lcarried by the frame members, a printing cylinder between the frame members supported by and mounted to 'rotate around said means, vand Va pair of anti-friction bearings interposed between said cylinder and said means, said means com.- prising a sleeve in the cylinderhavingannular abutments for spacing the inner races of said bearings, mounting blocks in the frame members, a shaft extending through said sleeve and into said mounting blocks, and clamping means carblocks inwardly against said inner races.

19. In a machine of the class described, a normally rotating printing cylinder, and elongate lcomprising a plurality of hollow members upon certain of which the cylinder is mounted to rotate, a shaft throughsaid hollow members, and means cooperating with said shaft for pressing said hollow members against each other end- ,wise, whereby they may be held in fixed relation t0 said shaft.

20. In a machine of the class described, a frame, a carrier having ends rotatably journaled in said frame, a cylinder rotatably mounted on said carrier eccentrically with respect to the journals of the carrier and within the frame, a

link and lever at one end of said carrier for imparting limited rotation thereto and so arranged that thecylinder is in operative position when said linkl and leverare in substantial alignment, and means for changing the effective length of said link and lever for altering the operative position of said cylinder While maintaining said substantial alignment.

2l. In a machine of the classy described, a frame, a. cylinder, a carrier for said cylinder extending therethrough, said carrier comprising circular mounting blocks oscillatably supported in said frame and a shaftmounted in and keyed tov ,I

40 ried by said shaft for forcing said mountingv blocks on bearings arranged' veccentrically with respect to the mounting blocks, and means for oscillating said carrier.

22. In a machine oi' the class described, a frame, elongate normally stationary means carried by the frame, a printing cylinder within the frame supported by and mounted to` rotate around said means, and a' pair of anti-friction bearings interposed between the cylinder and said means, said means comprising the following elements, namely, a shaft extending through the cylinder and longitudinally removable therefrom, a sleeve within the cylinder and surrounding said shaft of such length as to be removable transversely from the frame while remaining in the cylinder, said sleeve having a portion against which the inner race of one of said bearings abuts, means for holding said inner race against said sleeve portion, and means effective to prevent lateral movement of said sleeve relative to said shaft.

23. In a machine of the class described, a frame, a normally rotating printing cylinder therein, and normally stationary means carried by the frame and extending through the cylinder for supporting the latter, said means comprising hollow means upon which the cylinder is mounted to rotate, a shaft through said hollow means and removable therefrom endwise by relative movement in one direction whereby the shaft may be removed from the cylinder while said hollow means remainsI therein, and other hollow means around the shaft for holding said rst named hollow means in fixed lateral relation to said frame.

CHARLES W.'HARROLD. CLYDE G. HOR'ION. 

